Function to Sum a number of rows based on a variable

Hello!

I've been searching for an answer to my question, but unfortunately I'm not sure exactly how to describe my problem so I have been unsuccessful with my search. If anyone could help me with this I would be very appreciative.

As you can see in the attached excel doc, I have calculated a column for "Number of Claims Per week" and also "Dollar amount Per claim". This was done using VLOOKUP and distributions. That is not the issue.

The issue I am having is creating the "TOTAL" for the week. So for example, if week one generates 4 claims, I need to be able to add up claim amount #1-#4.

It seems as though this would be a basic function, but I can seem to find a way to add up a certain number of cells, based on a variable generated from a random number.

If you take a look a my excel sheet, I am trying to solve for the "Claim Total" column on the far right. This column should be the sum of (Number of claims * The individual amount per claim). Note that if there is 4 claims in that week, I would have to add up claim 1-4 to get that weeks total.

Greatly appreciate any help! Thanks.